The Dodge Durango as well as all the models of that year have a very deficient ducting system. The system hardly blows air at all on the drivers side even when the system is on high. I've checked Durangos, Dakotas and pick-ups. It apparently is a problem with most of the vehicles build on truck chassis for what that means. Anyway, I've gotten under the dash and there really isn't anyway to rectify the situation. It is simply a engineer's nightmare. There may have been a simply way to fix the problem, but there isn't enough room for adequate ducting.